| 摘要 |
The resonant frequency of an L1, C1 resonance circuit for magnetic field coupling of a wireless power supply and the power that is supplied wirelessly by a switching circuit (11) selectively exciting the resonance circuit by a frequency that is 1/3 of the resonant frequency of the circuit is rapidly changed. When excited at the resonant frequency, a large power is supplied, and when excited at 1/3 of that frequency, a small power is supplied. Thus, a wireless power supply device capable of increasing the power conversion efficiency, reducing unwanted radiation, and rapidly changing the power supplied can be provided. |
